Security advisory

{
  "id": "a8603a3c23f418ed3f987e226d36e068d063a7e41a42a9e39f0b25a8cdabc618",
  "url": "https://osv.dev/vulnerability/CVE-2020-36320",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-36320",
    "summary": "Unsafe validation RegEx in EmailValidator class in com.vaadin:vaadin-server versions 7.0.0 through 7.7.21 (Vaadin 7.0.0 through 7.7.21) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.",
    "evidence": "osv:CVE-2020-36320",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-36320",
      "aliases": [
        "CVE-2020-36320",
        "GHSA-42j4-733x-5vcf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/vaadin/framework",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b29ce01468ed115e942105986da362d665408033"
                },
                {
                  "fixed": "2e8b9d2b5b40652321aaa9d2bb2dba1041da7fc4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.0.0"
                      },
                      {
                        "fixed": "7.7.22"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-36320.json",
            "vanir_signatures": [
              {
                "id": "CVE-2020-36320-0b17bf01",
                "digest": {
                  "length": 803,
                  "function_hash": "70238186071019796089957604109989074107"
                },
                "source": "https://github.com/vaadin/framework/commit/2e8b9d2b5b40652321aaa9d2bb2dba1041da7fc4",
                "target": {
                  "file": "client/src/main/java/com/vaadin/client/widgets/Grid.java",
                  "function": "resetDataAndSize"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-36320-5403185e",
                "digest": {
                  "length": 2659,
                  "function_hash": "159032919065872499528707002309020957668"
                },
                "source": "https://github.com/vaadin/framework/commit/2e8b9d2b5b40652321aaa9d2bb2dba1041da7fc4",
                "target": {
                  "file": "client/src/main/java/com/vaadin/client/widgets/Grid.java",
                  "function": "setDataSource"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-36320-c5e9f4a9",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "112588331114063840301821684161472131075",
                    "259725082016287695756474403627992790190",
                    "285569396673585442444274777239224239797",
                    "287030043245834058136881203736707252383",
                    "163998985132657330949057748938740710735",
                    "82967592614209807592900968106297214298",
                    "326624101632401204292249361457727064036"
                  ]
                },
                "source": "https://github.com/vaadin/framework/commit/2e8b9d2b5b40652321aaa9d2bb2dba1041da7fc4",
                "target": {
                  "file": "client/src/main/java/com/vaadin/client/widgets/Grid.java"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:12:06Z"
          }
        }
      ],
      "modified": "2026-10-24T14:12:06.507973613Z",
      "provider": "osv",
      "references": [
        "https://vaadin.com/security/cve-2020-36320",
        "https://github.com/vaadin/framework/issues/7757",
        "https://github.com/vaadin/framework/pull/12104"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "vaadin:vaadin",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0.0"
                  },
                  {
                    "fixed": "7.7.22"
                  },
                  {
                    "introduced": "7.0.0"
                  },
                  {
                    "fixed": "7.7.22"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-36320",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443319,
  "published_at": "2021-04-23T16:15:08.36+00:00"
}